Figure out what went wrong and address any underlying issues before going further. One mediocre grade will not sink an application, but a string of bad grades may require GPA repair and will make this journey much tougher..
Hi, B in intro bio here (I was a bio major): I'm of the mindset that you can't really do anything freshman or sophomore year that you can't learn and come back from somehow. I've only had one interviewer mention it, and it was really just a casual joke/comment.